#!/bin/bash

GDAL_TILE_PROCESSES=16
GDAL_TILE_ZOOMS=8-14
GDAL_SAMPLING_WARP=cubic
GDAL_SAMPLING_TILE=antialias

# Create virtual dataset with coordinates
gdal_translate -of VRT -a_srs EPSG:4326 -outsize 300% 300% -gcp 4956.0 7422.0 26.62455 56.936726666666665 -gcp 40656.0 7458.0 26.666211666666666 56.936726666666665 -gcp 40590.0 40332.0 26.666211666666666 56.91589666666667 -gcp 4890.0 40320.0 26.62455 56.91589666666667 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-003369-PLANSETE-084-a-16_3369.JPG LVVA-001679-0217-003369-PLANSETE-084-a-16_3369.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4956.0 7422.0\n40656.0 7458.0\n40590.0 40332.0\n4890.0 40320.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-003369-PLANSETE-084-a-16_3369.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-003369-PLANSETE-084-a-16_3369.vrt LVVA-001679-0217-003369-PLANSETE-084-a-16_3369.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-003369-PLANSETE-084-a-16_3369.cut.vrt LVVA-001679-0217-003369-PLANSETE-084-a-16_3369.xyz